*, *:before, *:after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: 'Open Sans', Helvetica, Arial, sans-serif;
    background: #ededed;
  }
  
  input, button {
    border: none;
    outline: none;
    background: none;
    font-family: 'Open Sans', Helvetica, Arial, sans-serif;
  }
  
  $contW: 900px;
  $imgW: 260px;
  $formW: $contW - $imgW;
  $switchAT: 1.2s;
  
  $inputW: 260px;
  $btnH: 36px;
  
  $diffRatio: ($contW - $imgW) / $contW;
  
  @mixin signUpActive {
    .cont.s--signup & {
      @content;
    }
  }
  .wrapper{
   height:100%;
   overflow: hidden;
   background: linear-gradient(to bottom right, #B3F5B7 , #EDF2EE)
  }
  .tip {
    font-size: 40px;
    font-weight: bold;
    color: #045704;
    text-align: center;
    padding-top: 40px;
  }
  
  .cont {
    overflow: hidden;
    position: relative;
    width: $contW;
    height: 550px;
    margin: 0 auto 100px;
    background: #DEF4F0;
    box-shadow: 4px 1px 4px #B6B5B5;
    margin-top: 100px;
  }
  
  .form {
   
    position: relative;
    width: $formW;
    height: 100%;
    transition: transform $switchAT ease-in-out;
    padding: 50px 30px 0;
  }
  
  .sub-cont {
    overflow: hidden;
    position: absolute;
    left: $formW;
    top: 0;
    width: $contW;
    height: 100%;
    padding-left: $imgW;
    background: #DEF4F0;
    transition: transform $switchAT ease-in-out;
  
    @include signUpActive {
      transform: translate3d($formW * -1,0,0);
    }
  }
  
  button {
    display: block;
    margin: 0 auto;
    width: $inputW;
    height: $btnH;
    border-radius: 30px;
    color: #fff;
    font-size: 15px;
    cursor: pointer;
  }
  
  .img {
    overflow: hidden;
    z-index: 2;
    position: absolute;
    left: 0;
    top: 0;
    width: $imgW;
    height: 100%;
    padding-top: 360px;
  
    &:before {
      content: '';
      position: absolute;
      right: 0;
      top: 0;
      width: $contW;
      height: 100%;
      // https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/sections-3.jpg
      background-image: url('../../../static/img/login.jpg');
      background-size: cover;
      transition: transform $switchAT ease-in-out;
    }
  
    &:after {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      background: rgba(0,0,0,0.6);
    }
  
    @include signUpActive {
      &:before {
        transform: translate3d($formW,0,0);
      }
    }
  
    &__text {
      z-index: 2;
      position: absolute;
      left: 0;
      top: 50px;
      width: 100%;
      padding: 0 20px;
      text-align: center;
      color: #fff;
      transition: transform $switchAT ease-in-out;
  
      h2 {
        margin-bottom: 10px;
        font-weight: normal;
      }
  
      p {
        font-size: 14px;
        line-height: 1.5;
      }
  
      &.m--up {
  
        @include signUpActive {
          transform: translateX($imgW*2);
        }
      }
  
      &.m--in {
        transform: translateX($imgW * -2);
  
        @include signUpActive {
          transform: translateX(0);
        }
      }
    }
  
    &__btn {
      overflow: hidden;
      z-index: 2;
      position: relative;
      width: 100px;
      height: $btnH;
      margin: 0 auto;
      background: transparent;
      color: #fff;
      text-transform: uppercase;
      font-size: 15px;
      cursor: pointer;
      
      &:after {
        content: '';
        z-index: 2;
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        border: 2px solid #fff;
        border-radius: 30px;
      }
  
      span {
        position: absolute;
        left: 0;
        top: 0;
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        height: 100%;
        transition: transform $switchAT;
        
        &.m--in {
          transform: translateY($btnH*-2);
          
          @include signUpActive {
            transform: translateY(0);
          }
        }
        
        &.m--up {
          @include signUpActive {
            transform: translateY($btnH*2);
          }
        }
      }
    }
  }
  
  h2 {
    width: 100%;
    font-size: 26px;
    text-align: center;
  }
  
  label {
    display: block;
    width: $inputW;
    margin: 25px auto 0;
    text-align: center;
  
    span {
      font-size: 12px;
      color: #cfcfcf;
      text-transform: uppercase;
    }
  }
  
  input {
    display: block;
    width: 100%;
    margin-top: 5px;
    padding-bottom: 5px;
    font-size: 16px;
    border-bottom: 1px solid rgba(0,0,0,0.4);
    text-align: center;
  }
  
  .forgot-pass {
    margin-top: 15px;
    text-align: center;
    font-size: 12px;
    color: #cfcfcf;
  }
  
  .submit {
    margin-top: 40px;
    margin-bottom: 20px;
    background: #d4af7a;
    text-transform: uppercase;
  }
  
  .fb-btn {
    border: 2px solid #d3dae9;
    color: darken(#d3dae9, 20%);
  
    span {
      font-weight: bold;
      color: darken(#768cb6, 20%);
    }
  }
  
  .sign-in {
    transition-timing-function: ease-out;
    margin-top: 90px;
    @include signUpActive {
      transition-timing-function: ease-in-out;
      transition-duration: $switchAT;
      transform: translate3d($formW,0,0);
    }
  }
  
  .sign-up {
    transform: translate3d($contW * -1,0,0);
    margin-top: 90px;
    @include signUpActive {
      transform: translate3d(0,0,0);
    }
  }
  
  .icon-link {
    position: absolute;
    left: 5px;
    bottom: 5px;
    width: 32px;
  
    img {
      width: 100%;
      vertical-align: top;
    }
  
    &--twitter {
      left: auto;
      right: 5px;
    }
  }